his four years in office, the president has made unprecedented use of this weapon, with more than 400 cia strikes against targets in pakistan and yemen. that's eight times as many as under president george w. bush. and now nbc news's michael isikoff has obtained a 16-page justice department memo that makes the legal argument to justify this administration's use of drones to kill terror suspects, including american citizens. the government can order the killing of its own citizens without due process if those citizens are believed to be senior operational leaders of al qaeda or an associated force, even if there is no intel indicating they are involved in an active plot to attack the united states. today attorney general eric holder addressed the issue. >> we only take these kinds of actions when there is an imminent threat, when capture is not feasible, and when we are confident we are doing so in a way that is consistent with federal and international law. >> yet, according to the memo, the government gets to define the word "imminent" in a very broad way. the condition that an operation